Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef3395b2c88ad5b…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 06:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a51b4223c79f8891434d3ca6f26aa9c5 SHA-1: e58bde5b322769200b4b628d8cf0aece5fef2fbb SHA-256: 7ef3395b2c88ad5b7208ec6ac3bcab462819f52dd79d161f8243c6964156a6e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, with one prominent URL pointing to a download for a 'tiktok-free-liker-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple game-cheat-related URLs suggests a social engineering attempt to trick users into downloading malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/835599320/tiktok-free-liker-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-attrition-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-cookie-list_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-personal-information_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-how-to-get-free-robux-no-hacks-no-glitches_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-neon-blue-tie-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-printable-roblox-birthday-card_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85 21392 bytes
SHA-256: 6ea2430aded0e8f337e1bf519478d61533d586b6c03248f603d8f83f8c5217ab
font_01_sfnt_off00005e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E66 17972 bytes
SHA-256: d9778596a24ecd4cc9d35b43a9c03f4b924ee5368a29f14522ce150734379585

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